You’d better _________ to the old like that, it’s ________.

Polar bears live_______ on sea ice，which they use as a platform for hunting seals

MacDonald who had spent much of his time graduating from college backpacking round Europe,decided last year to settle down.

With increasing working pressure, Anthony has ________ time to spend with his friends than before.

So ________ that all the living things are dying out gradually. [ ]